This Blued Tactical package is the same as the V3 with addition of the unbeatable high power Gamo Laser system. The V3 has a detachable magazine that holds your CO2 cylinder and 15 shots of BBs that slips right into the grip, also interchangeable with the PX-107! The receiver slides back and forth after each shot to further enhance your shooting experience. (This is NOT a blowback gun).